| 人口 | rén kǒu | population; people | |
| 出口 | chū kǒu | an exit; Classifiers: 个 ; to speak; to export; (of a ship) to leave port | |
| 门口 | mén kǒu | doorway; gate; Classifiers: 个 | |
| 窗口 | chuāng kǒu | window; opening providing restricted access (e.g. customer service window); computer operating system window; fig. medium; intermediary; showpiece; testing ground | |
| 进口 | jìn kǒu | to import; imported; entrance; inlet (for the intake of air, water etc) |
